fixed typo error

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@6033 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ZPyChart.py

@@ -37,7 +37,7 @@ from Products.PythonScripts.PythonScript import PythonScript
 try:
   import pychart
 except ImportError:
-  psychart = None
+  pychart = None
 
 from zLOG import LOG